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Thread: Auto oil change interval - Transmax Z

  1. 17th December 2011, 10:12 PM #1
    Fluids's Avatar
    Fluids
    Fluids is offline YarnMaster Subscriber
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    Auto oil change interval - Transmax Z

    Working my way through a 160k service ... D2.

    Change the auto fluid today. Did it a 120k and used Valvoline ATF DX-III, and changed it 4 times over around 500km to flush the whole auto out ... the oil was pretty crap when dropped, looked like it was well overdue, so filled and drained numerous times to get as fresh a start as possibe ... fitted a new filter too.

    The last 40k it has run sweet. Smooth changes & TC lockups. No leaks.

    I dropped the fluid again today. 4.5L out, and it looked really clean, still red translucent, smelt good, and only slightly darker than when put in. I replaced it with 4.5L of Castrol Transmax Z. So it's about 50/50 old and new ATF.

    Now the service schedule says auto oil change every 40k. Took me 2.5yrs to do 40k.
    The Castrol product literature says in respect of oil changes ...

    Extended drain interval in heavy duty automatic transmissions
    * City and Suburban service 100,000km or 2 years

    * On-Highway 300,000km or 2 years


    I'm a City / Suburban service kinda guy ... would you really run a ZF 4HP22 100k between oil changes on Transmax Z ?


    Add in some off-road driving / beach, etc ... no towing, and a 50/50 mix of 40K old and new ATF ....


    ... and you would schedule your next ATF change for how many kms ??



    The stuff's not cheap, so no point changing it sooner than need be.




    Kev..

    Going ... going ... almost gone ... GONE !! ... 2004 D2a Td5 Auto "Classic Country" Vienna Green

    2014 MUX LST with fruit
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  2. 18th December 2011, 08:05 AM #2
    PhilipA
    PhilipA is offline Swaggie Subscriber
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    I change mine before big trips or at about 30KK, because I tow a camper trailer.
    I hope you also change the filter screen at the time as oil flow depends on a clean screen .

    At 30KK I still find some clutch material in the sump but not too much and I change the screen every time. Mine has been running 100% Transmax since I had the rear main seal of the engine done at about 105KK as they had to take off the TC..

    You CAN of course leave it longer but seeing that a new transmission is about $4K , to me $89 (plus $40 for the screen and gasket) every 2-3 years is pretty cheap insurance.

    Mine has now done 208KK and is AFAIK perfect, unlike many I see on this forum.
    Regards Philip A
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  3. 18th December 2011, 05:14 PM #3
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    Basil135
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    I do mine about every 12 months or so, and I do 15 - 20 k kms per year.

    Excessive? Probably
    Overkill? More than likely.

    HOWEVER, what is the cost of a ZF auto rebuild??? We know the answer to that one.

    BTW - if you can afford the time, I drop the ATF on a Saturday morning, and re-fill on Sunday arvo. I tend to get nearly 6L out over this period of time.
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